Tool-holder



C. A. STRAND.

TOOL HOLDER.

APPLICATION FILED MAR. Io, I9I9.

Patented Dec. 7, 1920.,

I 2 SHEETS-SHEET lffy@ ESL- 5% C. A. STRAND.

T001v HOLDER.

APPLICATION FILED MAR. 10, 1919. v

. Patented Dec. 7, 1920,A

2 SHEETS-SHEET 2.

UNITED STATES CHARLES A.. STRAND, OF CHICAGO, ILLINOIS.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application led March 10, 1919. Serial No. 281,709.

T 0 all* whom t may concern.'

Be it known that I, CHARLES A. STRAND, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tool-Holders, of which the following is a specification.

rlhis invention relates to that class of toolholders which are suitable for holding cutting tools in operative position upon lathes or similar machines.

The principal object of the invention is to provide a simple, economical and efficient tool-holder for lathes or similar machines, adapted to enable any desired cutter or tool of a set to be adjusted to and securely held in the desired operative position in an eilicient manner; and to enable each of a plurality or set of cutting tools or lathe tools to be used interchangeably, adjusted accurately and with facility to the desired angle or degree of inclination or operative position, and firmly secured and held in such position so as to perform its work in an efficient manner.

Other and further objects of the invention will appear from the following description and claims, and from an examination of the accompanying drawings, which are made a part hereof.

The invention consists in the features, combinations, and construction and arrangement of parts herein described and claimed.

In the accompanying drawings- Figure l is a plan view of a tool-holder constructed in accordance with my invention:

Fig. 2 a view in side elevation of the device shown in Fig. l; j

Fig. 3, a similar view in side elevation, with parts broken away, and showing the rotative tool-supporting head with its hub in eccentric relation to its rotative split supporting sleeve, and with said head and hub and sleeve adjusted to a different position from that in which said parts appear in Fig. 2;

Fig. 4, "a view in transverse vertical section taken on line 4 of Fig. 2, looking in the direction indicated by the arrow;

Fig. 5, a view in vertical section, taken on line 5-5 of Fig. l, looking in the direction of the arrow;

Fig. 6, a detail view in elevation showing the inner or back side of the rotativetoolsupporting head provided withradial slots adapted to engage the rotative or rocking guiding detent or boss for bracing and securely holding the tool-supporting head against rotation with any desired cutting tool in correct operative position;

Fig. 7, a perspective view of the split sleeve with its eccentric opening or socket, for holding the rotative tool-supporting head -in any desired adjusted position into which the head is adapted to be moved;

Fig. 8, an end view of the radially slotted or handle-supporting end of the sleeve shown in Fig. 7;

Fig. 9, a detail view in end elevation of `a boringtool clamping and supportingmem` ber having a supporting hub adapted to be removably mounted in the eccentric socket of the sleeve shown in Figs. 4, 5 and 7, when the rotative head shown in Fig. 4 is removed; and

Fig. 10, a view in side elevation of the device shown inA Fig. 9, with a boring tool clamped and held in operative position thereby.

In constructing a tool-holder forlathes or similar machines, in accordance with my invention l provide a rotative tool-supporting head l, which is, by preference, of approximately circular form, and is provided with a hub 2, which may be made in one integral piece with the head. The hub shown in the drawing is hollowed out so as to provide an axial opening or socket 3 for admitting the stem 4 of a spring-pressed angular adjustable handle or lever 5 for rotating a split supporting sleeve 6 having an eccentric end opening or socket 7 adapted to admit and engage the periphery of the hub 2of the tool-supporting head l. The sleeve 6 has a segmental peripheral groove 8 cut through the peripheral wall of the sleeve at the inner extremity of the eccentric socket or opening and communicating with the latter; and a longitudinal peripheral groove 9 is cut through the entire peripheral wall portion of the sleeve from said circumferential groove 8 to the open end or longitudinally split end of the flexible sleeve. The portion of the sleeve between the peripheral groove 8 and the open Vor longitudinally slotted or split extremity of the sleeve which encircles the hub 2 when the latter is in operative position in the sleeve, is thus flexible and adapted to be clamped into rigid tightly fitting engagement with the hub 2, or with any similar hub of any tool-supporting head orclamping device which may be used in connection with the split sleeve when the head 1 is removed to permit such use of anl other device. rllhe sleeve has an rin-severed peripheral portion 10 which connects` the 'the stem 4 seas to tend to press the stem 41 and handle' or lever 5 inward. rlhe split sleeve is provided with a seriesrof radial notches 15 in the end thereof adjacent to the angular or radial handle 5 adapted to permit the handle to be yieldingly held in po sition to extend into any desired one of said notches, and to be adjusted from one to the other of said notches in any desired order. The split sleeve is thus adapted to be r0- tated with facility by means of said handle 5. It is obvious, however, that any desired ordinary and well known'form of handle or operating lever may bev employedV as a means for rotating the sleeve, and that'the sleeve can beV rotated manually without any handle or lever; butthe lever Vis aconvenient means for enabling the sleeve to be rotated or' adjusted with facility.

' The tool-supporting head 1 is provided on one side with a series .of radial grooves 16.I eachadapted to admit and removably hold in place a cutting tool. Each of the grooves 16 has an overhanging lip or flanged? at its outer margin adapted to overlap the adjacenty edge of the tool to be inserted in such groove, so as to hold the tool firmly and securely in place inthe groove; and a set screw 18V is provided for each groove 16 and mounted in vthreaded engagement with the rotative tool-supporting head 1 and in position to engage and securely hold in position any .tool mounted in such groove.

v TheV head 1 is shown in the drawings provided with a cutting-offtool 19 removably Ymounted i-n one groove; anl ordinary cutter, such as; rs commonly known as a diamond point 2O in another groove; a right-hand cutter 21, in another groove, and a left-hand j cutter 22 in another groove. 'It is obvious,-

' however, that the cutters may be of vany deA sired form; and that any desired number of heads 1, with any desired number of cutters rof various forms mounted therein, may be usedl inter'changably,

y with the same 'split sleye. e

' en adjustable clamp 23 is provided, which comprises in its construction a main body or standard which forms a lower rigid clamping jaw 2e and has an upper flexible or relatively movable clampingV jaw 25 provided with an opening or socket 26 between said clamping jaws adapted to admit and securely hold the split sleeve 6 between said clampingjaws. lThe upper or flexible clamping jaw is, bypreference made in one integral piece with the main body portion or lower rigid upwardly p rojectinoclampi f' jaw 24 and projects over the latter, sai jaw portionsV being provided with a hori- Zontal notch 27 therebetween which com municatesV with the circular opening or socket 26, and is adapted to permit the dcsired relative movement of `the upper or movable clamping jaw with respect 'to the lower or rigid aw to enable the aws to be clamped into rigid securing engagement with `the split sleeve 6, and to clamp the flexible walls of the split sleeve 6 intosnugly fitting vrigid engagement with the journal or hub portion 2 of the tool supporting head .l

or socket 7 of said sleeve, and to permit the releasing of the sleeve so as to enableit to be turned or rotated to any desired extent in its circular socket between the jaws and with respect to the journal or hub to be supported by the slee e. Arn upright clamping screw 28 extends vertically through the jaws 211 and 25 which are provided with suitable .t

vertical openings vfor receiving it; and the lower end of the said clamping screw is, by preference, mounted in threadedengagd nient with a flanged guide 29 which extends beneath Y and in engagement--preferably clamping engagement with the bottom face of the clamp The slidable guide 29 has side flanges 30 which are adapted to fit into Y similarly shaped grooved portions of the bed of' a lathe, or of a carriage or sliding rest on a lathe, or other suitable support.

The guide 29 thus being mounted in sliding engagement with a suitably grooved support, such, for instance, as the tool-carriage of a lathe, it will be readily seen that the upright clamping screw or belt 28'is adapt ed to form a pivot'upon which the clamp 23 may be rotated or turned in a horizontal plane or in a plane perpendicular' to the axis of the clamping screw, in whatever position thelatter may be supported. lt should be noted that the flexible split sleeveV 6 has an lannular circumferential groove 3-. in its periphery, adapted tojadmit and engage the clamping screw 28, which is Vthus enabled. to serve to hold the-sleeve 1n placev in itsV circular socket or space between the clamping` lll( either direction as desired to any desired adjusted position, when the clamping jaws are in releasing position, and to be securely clamped in any desired adjusted position by means or' the clamping jaws and clamping screw mechanism above described.

The clamp 23 is provided with a base plate or horizontal extension 32 having a segmental slot 33 therein; and a clamping screw 34 is mounted in position to extend through said slot and into clamping engagement with the slotted portion of the base plate, so as to rigidly secure and hold the base plate and the clamp or main body of the tool support as a whole in any desired position into which it is adapted to be adjusted or turned upon its vertical pivot formed by the main clamping` screw 23. The clamping screw 34 is, by preference anchored or mounted in threaded engagement with the lianged slidin guide 29, in position to project upward through and into slidable clamping engagenient with the curved slot 33--the screw 34 being, of course provided with a head or laterally projecting flange portion 35 adapted to engage the slotted base-plate, to hold -it clamped in rigid operative position, in any desired adjusted position.

ln order to provide simple and eiiicient means for permitting the rotative tool-supporting head l to be rotated to any desired adjusted position, so as to present any desired one of a plurality or set of cutting tools in proper operative position or in position to engage the work or material to be operated upon, and for securely bracing and holding the head and tool in rigid operative position, when so adjusted, and, in that connection, to enable the tool to be tilted to the desired incline, or to horizontal position, or raised or lowered with respect to the center of the chuck or with respect to the work or material to be operated upon, the rotative tool-supporting head l is provided with a` series of radial slots 36 in its inner or back tace, or in position to face toward the clamp 23 and sleeve 6 when the journal or hub 2 et the rotative head is in position in the eccentric socket 7 of the said sleeve; and a detent 37 is mounted in the clamp 23, by preference, in the upper jaw portion 25 already described, and in position to extend into and in sliding engagement with any desired radial slot 36 in said head l. The de tent is, by preference, in the Jform of a rockor rotative pin havingf an elongated projecting end portion. 38 which projects endwise beyond the adjacent outer surface of the clamp or supporting member in which the de'tent is rockingly or rotatively mounted, and into position to extend into snugly :fitting but slidable engagement with any de sired slot 36 in the head l. The detent may be provided with a circumferential peripheral slot 39, into which a set screw orretaining screw 40 extends, so as to permit the partial rotation of the detent, so that the latter will conform to the position and degree of inclination or vertical position-as the case may be-of the slot 36 engaged by the detent, when the tool-supporting head l is in the desired adjusted position to support the particular tool which is to be used, in the proper operative position.

In order to provide means for`enabling another form of tool, such as a boring tool 4l to be mounted and supported in operative position and used in connection with the tool-supporting mechanism above described, when the head l is removed to permit the use of such other form of tool, I provide a tool-holder or clamp, avery desirable form of which is shown in Figs. 9 and 10, and which comprises in its construction a main body 42 having a lower rigid clamping jaw 43, and upper rigid flange, or jaw 44, and a laterally projecting journal or hub 45 of the same form and dimensions as the journal or hub 2 already described. A movable clamping member 46 is interposed between the upper and lower projecting members or jaws 43 and 44; and one or more set screws or clamping screws 47 are mounted in threaded engagement withthe top jaw or flange 44 and in such position that the inner ends of said screws engage the movable clamping member 46, so as to hold the latter in clamping engagement with any tool, such, for instance, as the boring tool 4l, which may be mounted between the lower jaw l43 and said movable clamping member 46. .Vhen the tool-supporting member 42 is to be used, the head l is removed from the sleeve 6, and the journal 45 is inserted in the eccentric socket or opening 7 in said sleeve,- in place of the hub 2, and the sleeve 6 is clamped into rigid engagement with the hub 45, in the manner already described with reference to the hub or journal 2 oit' the head l. The tool holder 42 is provided with aslot 48, which, like the slots 36 in the head l, is elongated and adapted toadmit and slidably engage the detent' 37 already described. The tool holder 42 is thus adapted to be adjusted and supported in any desired adjusted position, by means of the tool-holder mechanism shown in Figs. l to S inclusive.

The handle or lever 48, ttor operating the clrmping screw 23 is removably inserted in any desired suitable lateral opening 49 in said clamping screw, so that, in case the handle happens to reach a position where it would be in the way, when the clamping screw is properlytightened, the handle can be readily removed.

With the four sets oi radial slots 36 `in the head l, so disposed that either groove slot'36 may be adjusted into position to engage the rocking detent 37, the projecting end 38 of which Vis adapted to extend into any 'plane with respect to the langed guide 39,

and with respect to the bed of the lathe, or any carriage or support on which the clamp 23'is to be mounted. And the clamping screw 38 serves both as a pivot and a clamping means.

I claim: 1

l. In a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a rotative sleeve mounted between said clamping jaws, said sleeve having an eccentric opening therein, an adjustable rotative tool-supporting head having a journal adapted to extend into said eccentric opening in said sleeve, means for securing a plurality of cutting tools upon said head, means `i'or securing the jaws in clamping engagement with said sleeve, and means forsecuring the clamp to a support.

2. In a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a rotativeflexlble sleeve mounted between said jaws,

said sleeve having an eccentric opening` therein, an adjustable tool-supporting head having a journal rotatively mounted, in the eccentric opening in said sleeve, means for se# curing a plurality'of cutting tools upon said head, a detent upon said clamp and in engagement with the adjustable tool-support ing head, said detent being in eccentric relation to the tool-supporting head, a clamping screw in operative engagement with the clamping jaws, for operating the same, and means for securing the clamp to a suitable support.

3. In a tool-holder of the class described` the combination of a clamp having relatively movableV clamping jaws, a rotative flexible sleeve mounted between said jaws, said sleeve having an eccentric opening therein, an adjustable rotative Vtool-supper-ting head having a journal rotatively mounted in the eccentric opening in said sleeve, a detent upon said clamp and in engagement with the adjustable techsupporting head, a clamping screw in operative engagement with the clamping aws and adapted to secure the clamping jaw mechanism in clamping engagement with said sleeve, a guide secured to the bottom of said clamp, and means 'for securing the clamp in different adjusted positions with respectto said guide.

,4. In a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a; rotative flexible sleeve mounted between said jaws and provided with an eccentric opening in said sleeve, an adjustable rotative tool-supporting head having a journal rotativelyV mounted in the eccentrc opening in said sleeve, a flanged guide in engagement with the bottom of said clamp, and a clamping screw in threaded engagement with said guide and in operative engagement with the clamping jaw mechanism, for opening and closing the latter. V

5. In a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a rotative flexible sleeve mounted between said jaws, said sleeve having an eccentric opening therein, an adjustable rotative tool-supporting head having a journal rotatively mounted in the eccentric opening in said sleeve, said head having radial notches adjacent to the clamp, a detent upon said clamp and in' eccentric relation to said journal, and adapted to engage any desired radial notch in said head, a clamping screw in operative engagement with thefclamping jaws, and means for securing theV clamp upon a suitable support.

6. In a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a rotative flexibleY sleeve mounted betweenV said jaws, said sleeve having an eccentric opening therein, an adjustable rotative tool-supporting head having a journal rotatively mounted in the eccentric opening in said sleeve, said head having radial notches adjacent to the clamp, a detent upon the clamp and adapted to engage any desired radial notch in said adjustable head, a flanged guide in Vengagement with the bottom of said clamp, and a clamping screw inthreaded engagement with said guide and in operative engagement with the clamping jaw mechanism, for operating the latter.

7. In-a tool-holder of the class described, the combination of a clamp having relatively movable clamping jaws, a rotative flexible sleeve mounted between said jaws, said'sleeve having an eccentric opening therein, an adjustable rotative tool-supporting head hav'- ing a journal rotatively mounted in the eccentric opening in said sleeve, a ianged guide in enga-gement withk the bottom of said clamp, a clamping screw in threaded enmovable clamping jaws, a rotative flexible sleeve mounted between said j aws, said sleeve having an eccentric opening therein, an adjustable rotative tool-supporting head having a journal rotatively mounted in the eccentric opening in said sleeve, said head having a plurality of notches adjacent t0 the clamp, a detent upon the clamp and in eccentric relation to the journal and adapted to engage any desired notch in said head, to prevent the rotation of the head when such detent is in engagement with a notch, a flanged guide in engagement with the bottom of said clamp, a clamping screw in threaded engagement with saidv guide and extending-through said clamping jaws, a hase plate upon said clamp and provided with a segmental slot, and a clamping screw in threaded engagement with said guide and extending through the slotted portion of said base plate, for securing the clamp in any desired adjusted position with res ect to said guide.

Signed at hicago, Illinois, March 1, 1919.

CHARLES A. STRAND.

Witnesses Emo J. STRAND, HARRY I. CROMER. 

